公开(公告)号：AU2017254388A1

公开(公告)日：2018-09-27

申请号：AU2017254388

申请日：2017-03-27

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  LUO TAO ,  SADIQ BILAL ,  CEZANNE JUERGEN ,  SUBRAMANIAN SUNDAR ,  LI JUNYI

IPC: H04B7/0417 ,  H04B7/06

Abstract: When beamforming (e.g., via a millimeter wave system (mmW)) is used for wireless communication, a base station may transmit beams that are directed to certain directions. Due to the directional nature of the beams in the mmW system, an approach to determine a beam that provides a desirable gain is studied. The apparatus may be a user equipment (UE). The apparatus receives, from a base station, a plurality of signals through a plurality of beams of the base station, each of the plurality of beams corresponding to a respective antenna port of a plurality of antenna ports of the base station, where the plurality of signals include a plurality of beam reference signals, a plurality of beam refinement reference signals, a plurality of channel state information reference signals (CSI-RSs), or a combination thereof. The apparatus performs channel estimation for each beam of the plurality of beams from the plurality of antenna ports based on the plurality of signals.

公开(公告)号：AU2017252176A1

公开(公告)日：2018-09-27

申请号：AU2017252176

申请日：2017-03-27

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  LUO TAO ,  SADIQ BILAL ,  CEZANNE JUERGEN ,  SUBRAMANIAN SUNDAR ,  LI JUNYI

IPC: H04B7/0417 ,  H04B7/06 ,  H04B7/08

Abstract: When beamforming (e.g., via a millimeter wave system (mmW)) is used for wireless communication, a base station may transmit beams that are directed to certain directions. Due to the directional nature of the beams in the mmW system, an approach to determine a beam that provides a desirable gain is studied. The apparatus may be a user equipment (UE). The apparatus receives, from a base station, a plurality of signals through a plurality of beams of the base station, each of the plurality of beams corresponding to a respective antenna port of a plurality of antenna ports of the base station. The apparatus performs channel estimation for each beam of the plurality of beams from the plurality of antenna ports based on the plurality of signals. The apparatus transmits, to the base station, a feedback signal including information about one or more beams selected from the plurality of beams, the feedback signal further including one or more candidate uplink precoders.

公开(公告)号：AU2017249059A1

公开(公告)日：2018-09-27

申请号：AU2017249059

申请日：2017-03-31

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  LUO TAO ,  CEZANNE JUERGEN ,  SUBRAMANIAN SUNDAR ,  SAMPATH ASHWIN ,  SADIQ BILAL ,  LI JUNYI

IPC: H04B7/0417 ,  H04B7/06

Abstract: A first apparatus may communicate with a user equipment (UE) through an active beam. The first apparatus may transmit, to the UE, information indicating a periodicity at which control information is to be communicated on a control channel through a control-information beam. The first apparatus may communicate, with the UE, the control information on the control channel through the control-information beam at the periodicity. Further, the first apparatus may receive a request to change the active beam, which may indicate a beam index corresponding to a second beam, and the first apparatus may change the active beam to the second beam corresponding to the beam index indicated by the request.

公开(公告)号：AU2017247135A1

公开(公告)日：2018-09-20

申请号：AU2017247135

申请日：2017-03-06

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMED NAZMUL ,  SUBRAMANIAN SUNDAR ,  LUO TAO ,  CEZANNE JUERGEN ,  SADIQ BILAL ,  LI JUNYI

IPC: H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a sounding reference signal (SRS) configuration for user equipment (UE). The base station may transmit an SRS grant message to a UE indicating the SRS configuration. An indication of SRS parameters may be included in the SRS grant message, and may include the SRS parameters or a location of the SRS parameters. That is, SRS parameters may be transmitted in a control channel with the SRS grant message or may be separately sent in a data channel as indicated by the indication of SRS parameters. In some cases, SRS parameters may be determined based on previously received UE feedback regarding channel conditions or power limitations. Alternatively, the base station may make its own environment measurements or assign SRS parameters autonomously. The UE may signal SRS transmissions to the base station according to the SRS grant message.

公开(公告)号：AU2017247134A1

公开(公告)日：2018-09-20

申请号：AU2017247134

申请日：2017-03-06

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  SUBRAMANIAN SUNDAR ,  LUO TAO ,  CEZANNE JUERGEN ,  SADIQ BILAL ,  LI JUNYI

IPC: H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a sounding reference signal (SRS) configuration for user equipment (UE). The base station may transmit an SRS grant message to a UE indicating the SRS configuration. An indication of SRS parameters may be included in the SRS grant message, and may include the SRS parameters or a location of the SRS parameters. That is, SRS parameters may be transmitted in a control channel with the SRS grant message or may be separately sent in a data channel as indicated by the indication of SRS parameters. In some cases, SRS parameters may be determined based on previously received UE feedback regarding channel conditions or power limitations. Alternatively, the base station may make its own environment measurements or assign SRS parameters autonomously. The UE may signal SRS transmissions to the base station according to the SRS grant message.

公开(公告)号：AU2017246210A1

公开(公告)日：2018-09-13

申请号：AU2017246210

申请日：2017-04-01

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  LUO TAO ,  SUBRAMANIAN SUNDAR ,  CEZANNE JUERGEN ,  SADIQ BILAL ,  ABEDINI NAVID ,  LI JUNYI

IPC: H04L5/00

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for phase noise estimation in data symbols for millimeter wave (mmW). A method for wireless communications by a transmitting device is provided. The method generally includes identifying a phase noise metric associated with at least one receiving device; determining a phase noise pilot configuration based, at least in part, on the identified phase noise metric; and providing an indication of the phase noise pilot configuration to the at least one receiving device. A receiving device can receive the phase noise pilots in accordance with the configuration and determine phase noise for a data symbol based on the received phase noise pilots.

公开(公告)号：CA3031576A1

公开(公告)日：2018-03-01

申请号：CA3031576

申请日：2017-08-21

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  SUBRAMANIAN SUNDAR ,  SADIQ BILAL ,  ABEDINI NAVID ,  LI JUNYI

IPC: H04L5/00 ,  H04B7/06

Abstract: There is a need for a beam tracking technique that reduces the time needed to perform a beamforming procedure and that reduces beam overhead. The apparatus may determine a mapping between a first beam associated with a first type of channel and a second beam associated with a second type of channel. In an aspect, the first type of channel may be different than the second type of channel. The apparatus may receive the first beam associated with the first type of channel and the second beam associated with the second type of channel. In an aspect, the first beam and the second beam may be received from a second device.

公开(公告)号：CA3028465A1

公开(公告)日：2018-02-08

申请号：CA3028465

申请日：2017-07-28

Applicant: QUALCOMM INC

Inventor： SADIQ BILAL ,  SAMPATH ASHWIN ,  LUO TAO ,  CEZANNE JUERGEN ,  SUBRAMANIAN SUNDAR ,  ISLAM MUHAMMAD NAZMUL ,  GOROKHOV ALEXEI YURIEVITCH ,  PATEL SHRENIK ,  LI JUNYI

IPC: H04B7/06 ,  H04B7/08 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be communicating with a base station via beamformed transmissions on an active beam. The UE may receive from the base station refined reference signals (RRSs) that include an active beam RRS corresponding to the active beam. The UE may identify that the active beam RRS corresponds to the active beam and perform a beam state measurement on the active beam RRS. The UE may refine the active beam based at least in part on the beam state information of the active beam RRS.

公开(公告)号：CA3020215A1

公开(公告)日：2017-11-23

申请号：CA3020215

申请日：2017-05-01

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  LUO TAO ,  SADIQ BILAL ,  CEZANNE JUERGEN ,  LI JUNYI

IPC: H04W52/50

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a number of beam directions that satisfy a transmission power condition. The UE may select a beam direction for a random access signal by choosing one of the beam directions that satisfies additional criteria, such as transmitting a random access message at the next opportunity. The transmission power may be selected based on a target receive power and a path loss for the selected beam. In some cases, if the sum of the path loss for a beam direction and the target receive power exceeds a maximum transmission power by more than a predetermined amount, the random access signal will not be transmitted using that beam. In some cases, if a response to the random access is not received, a different beam direction may be selected, the transmission power may be increased, or both.

公开(公告)号：CA3016716A1

公开(公告)日：2017-10-19

申请号：CA3016716

申请日：2017-04-03

Applicant: QUALCOMM INC

Inventor： ISLAM MUHAMMAD NAZMUL ,  LUO TAO ,  CEZANNE JUERGEN ,  SUBRAMANIAN SUNDAR ,  SAMPATH ASHWIN ,  SADIQ BILAL ,  LI JUNYI

IPC: H04W74/00 ,  H04B7/04 ,  H04B7/0408 ,  H04B7/06 ,  H04B7/08 ,  H04W72/54

Abstract: One apparatus may be configured to detect a set of beams from a base station. The apparatus may be further configured to select a beam of the set of beams. The apparatus may be further configured to determine at least one resource based on the selected beam. The apparatus may be further configured to transmit, on the at least one determined resource, a beam adjustment request to the base station. The request may indicate an index associated with the selected beam. Another apparatus may be configured to transmit a first set of beams. The other apparatus may be further configured to receive a beam adjustment request on at least one resource. The other apparatus may be further configured to determine a beam index of a beam in the first set of beams based on the request and the at least one resource.